.. Oh man.. I've been suffering with playing zerg the last few days because I'm trying for the achievements with 'beta' in the name -- as it seems like 'beta' specific achievements may carry over.
Anyway.. zerg feel really underpowered unless you just rush air, or are lucky and you fight a terran without marauder or a tos without stalker, so roach then work. this roach change is a HUGE nerf to zerg, who already feel real weak mid and late game. You have to have double the supply for the same number of roaches, so the number of their strongest 'core' unit just went way down.
Even before the change, If you had two zerg against a combination of tos and terran, unless those zerg are way better players OR they hit really early, the zerg are at a huge disadvantage. Roaches were one of the few aces in the hole that zerg had, now they're way more costly and one of their few pros is so much weaker.
Tanks/hellions/marines in a much smaller cost quantity blow away zerg units. zealot/stalker/sentry murder zerg ground also in an even mineral cost battle.
In a mid to late game battle, it seems no matter how many fully upped roaches, hydra, or zerglings i throw at the enemy they die in a macro to macro battle to less expensive terran or tos units. This happens more 2 on 2 more than 1 on 1, because I've learned never to let a 1v1 game where i'm zerg go long BECAUSE of the inherent late game weakness.
The only potential aces in the hole zerg have are Banelings; which cost spending 75/25 to kill MAYBE 100 minerals in cost of units on the average leaving you with no army also. going mass air is weaker because of the phoenix changes against a tos.. Zerg have no 'core' anymore. I don't get those changes at all..